我厂的冷挤压车间,生产40余种汽车零件,均在普通立式压力机上分序挤压而成。普通压力机(如J31-160,J31-250,J31-315等)工作台面刚性都较差,在强大的挤压力作用下,工作板发生明显的弹性变形。下底板工作一段时间之后,表面平面度就被破坏,形成中部低周围高,中部下凹达0.8毫米。对于J81-400下传动冷挤压机,工作台面刚性要好些。但工作一段时间之后,也出现上述情况。在如此工作状态下,使用何种类型挤 Our factory’s cold extrusion workshop, producing more than 40 kinds of automotive parts, are in the ordinary vertical press extrusion press. Ordinary presses (such as J31-160, J31-250, J31-315, etc.) workstations are poor rigidity, under the action of a strong squeeze, the work panel obvious elastic deformation. After working for a period of time under the floor, the surface flatness was destroyed, forming a low central around the high, the central recess of 0.8 mm. For the J81-400 transmission cold extrusion machine, the work surface rigidity is better. However, after working for a period of time, the above situation also arises. What type of squeeze is used in this state of work